KR200307889Y1 - Error searcher or indicator of LED lamp - Google Patents

Abstract

In the LED lamp composed of one or more LEDs, if the LED is not lit due to a failure of some LEDs, the detector detects the unlit LED and displays it according to the contradiction according to the inconsistency according to the unlit rate of the unlit LED for all LEDs LED lamp contradiction detection and display characterized in that the display device.

Description

LED lamp contradiction detection and display device {Error searcher or indicator of LED lamp}

This is a technology to warn against disconnection and failure of brake lights, direction indicators, tail lights, reversing lights, license plate lights, fog lights, etc., which are exterior lights of cars. Application No. 20-2000-0023731 Instead of incandescent lamps, low power, long life, using a number of LED lights for the exterior of the car application No. 20-1997-0002378 'vehicle tail light using the LED lamp', application number 10-2000-0013213 'LED rear lamp and indoor light There is.

The present invention relates to a self-diagnosis device for automobile lamps (external display lamps), and more specifically, a person who detects a breakdown of various lamps such as a brake light, a direction indicator light, a tail light, a reverse light, a license plate light, a fog light, etc. installed in an automobile. It relates to a diagnostic device.

Automobiles are equipped with various external indicators such as brake lights, direction indicators, taillights and reversing lights in front and rear of the vehicle as a signal system for communicating the driver's intention to the front and rear vehicles.

Therefore, since a plurality of lamps are used, the life of the lamps is terminated with different standard deviations, so that the lamps may be driven without knowing that there is a breakdown or the like, causing traffic accidents.

Moreover, it is difficult for the driver to know the third party not to know the failure state of the lamps on his vehicle, and it is inconvenient to check the failure state of each lamp while operating the respective operation switches. In addition, the external display using low-power, long-life LED has a problem that can not be started by the over discharge of the battery if the taillight is turned on for a long time after the engine stop, there is a technology that uses a low-power LED as an external display.

However, when connecting LEDs using multiple LEDs as a display light source in series, when one LED is disconnected due to an unexpected failure, all other LEDs do not light up, and when connected in parallel or in parallel, the above problems are avoided. However, if the number of faulty LEDs is increased, it is necessary to replace the external lights or repair the faulty LEDs.However, in the method of detecting the replacement or repair time, a single light bulb such as the above-mentioned 'outdoor light diagnostic display system of a car' is applied. In the case of an LED external display lamp using a plurality of LEDs as a light source instead of a lamp as a light source, there is a problem in that the failure state cannot be determined by the above technology.

The present invention is designed to solve the above problems, it is regarded as normal when a small number of LEDs of a plurality of LEDs connected in parallel or in parallel or in parallel, and is not lit when a large number of LEDs are not lit. A display device for displaying a warning message according to the number of LEDs (not lighting rate) is a technical problem.

1 is a series of LED lamps connected in series, serial and parallel

2 is a circuit diagram of LED lamp contradiction detection and display device having a detection unit by a detection coil;

3 is an equivalent circuit diagram of a detection unit by the classification resistance

<Explanation of symbols for the main parts of the drawings>

100: detection unit

200: comparator

300: detection coil

400: Classification resistance

In the LED lamp composed of one or more LEDs, if the LED is not lit by the failure of some LEDs, the detector detects the unlit LEDs and determines the contradiction according to the unlit rate of the unlit LEDs for all LEDs. In the LED lamp contradiction detection and display device characterized by a display device for displaying a warning according to the), in the state in which the LEDs of multiple display light sources as shown in Fig. 1 in series connection or in a direct or parallel connection as shown in Fig. 2 in series The coil, resistor, and zener diode of the LED are connected in parallel to the last row of LEDs, and the coil consists of a detection coil 300 that detects the induced electromotive force.In general, LEDs connected in parallel do not conduct current by the zener diode in the reverse direction of the LEDs. If both are disconnected due to failure, zener breakdown occurs due to the zener diode connected to the LED in reverse direction. Thereby barrel.

Even though all LEDs in the same row are disconnected due to the conduction of current, the LEDs in the next column are normally turned on, and the detector compares the voltage detected by the classification resistor with the reference voltage according to the input resistance of the comparator 200 and exceeds the reference voltage. The input resistance is a variable resistor. The administrator inputs the number of unlit LEDs that the administrator judges as contradictory by adjusting the variable resistance value.

When the LEDs in the same row are all disconnected, the resistance changes when the zener breakdown occurs because all of the LEDs are disconnected from the same row during normal lighting to prevent more current than the normal current flows through the LEDs. It has a resistance of so that all the LEDs in the same row are disconnected so that the overall resistance does not change so that the rated current flows to each LED.

When the current is conducted through zener breakdown, current is applied to the coil to generate induced electromotive force, and the induced electromotive force is detected by the detection coil 300, and according to the magnitude of the current flowing through the detection coil, the two steps such as 'normal' and 'danger' or A warning signal such as 'danger' is displayed on the display.

In another embodiment, in the LED indicator using a plurality of LEDs as an indicator, the detector detects the contradiction according to the amount of change in the current and voltage detected by the classification resistor 400 as shown in FIG. An example of an application for displaying a display device is possible.

In addition, in the detection of contradiction, instead of the coil and the detection coil, an application example in which an auxiliary LED, a Cds (cadmium sulfide phototube, a photoconductive sensor), an ultrasonic wave, an Ir sensor (infrared sensor), a thermal sensor, or the like is possible is possible.

The contradiction signal detected by the above method increases or decreases the current amount in proportion to the number of LEDs disconnected. Therefore, the comparator using a general voltage comparison circuit compares with the input value of the manager in order to increase or decrease the current amount. Displayed on the display device is considered to be a contradiction or a contradiction, but the application example of the display device such as the display signal of the color, such as blue, red or the like for each position determined by the contradiction in the shape of the vehicle will be possible to those skilled in the art.

In the most representative embodiment of the present invention, LED lamps composed of one or more LEDs have the same row connected in series and the same row connected in parallel, in parallel and parallel LED lamps. Zener diodes, coils, and all LED resistors in the same row and resistors when Zener breakdown of the Zener diodes are connected in series, are connected in parallel to all rows, and all LEDs of a specific row in the light emitting unit are connected in parallel. Zener breakdown occurs when a breakdown occurs, and current is transmitted to the next row of LEDs.As a resistor that prevents a decrease in the total resistance value due to a failure of the LED, there is no change in the overall resistance value. It doesn't affect other LEDs in the circuit. Usually, no current is conducted to the part consisting of zener diode, resistor and coil, but all LEDs in the same column Only when the zener breakdown of the field or zener diode occurs, current is conducted, so only the induction current is generated in the coil to detect the LED that is not lit.The LED that is not lit for all LEDs in the comparator of the detector according to the magnitude of the induced current. LED lamp is a contradiction detection and display device characterized by the contradiction detection unit to regard the non-lighting rate of the comparison to the input value of the manager as normal, contradiction detection.

In case of using a single light source as a display lamp like a conventional incandescent lamp, there is no method of detecting a contradiction in the case of an LED lamp using multiple light sources as a display lamp, but the number of unlit LEDs If it is less than manager's input unlit rate, it is regarded as normal, but LED lamp which detects contradiction and displays contradiction when LED number not unlit increases because it is larger than manager's input unlit rate. Device.

Claims (5)

In the LED lamp composed of one or more LEDs, if it is not lit by the failure of some LEDs, it is detected by the detector and compared with the manager's input unlit rate according to the unlit rate of unlit LED for all LEDs. LED lamp contradiction detection and display device, characterized by the display device to display a message that is considered normal when the non-lighting rate is less than the input value of the manager, and when exceeded, it is necessary to replace the LED. The detector of claim 1, wherein the detector comprises a coil, a resistor, a detector formed of a zener diode, a detector coil, and a comparator in a reverse direction to the LED in series, and a detector connected in parallel to the last row of the LEDs in an LED lamp connected in parallel or in parallel with one or more LEDs. LED lamp contradiction detection and display device. The LED lamp contradiction detection and display device according to claim 1, wherein the detector detects a change in current and voltage detected by the classification resistor and detects a contradiction in comparison with an input value of a manager. 2. The LED lamp contradiction detection and display device according to claim 1, wherein the LED lamp is an external indicator of a vehicle, wherein the LED lamp is a brake light, a turn signal light, a tail light, a reverse light, a license plate light, a fog light. 2. The LED lamp of claim 1, wherein the LED lamps of one or more LEDs have a series of LED lamps having the same row connected in series and the same row connected in parallel. Connect the resistance of the car in series with the resistance when the zener breakdown of the zener diode occurs in series with the coil and the same row. Zener breakdown occurs when it occurs, and current is transmitted to the next row of LEDs.It is a resistor that prevents the reduction of the total resistance value due to the failure of the LED. Normally, current does not conduct to the part composed of zener diode, resistance, and coil, but all LEDs in the same column are broken or the zener diode LED conduction detection and display device is characterized by a contradiction detection unit that detects the LED of the heat that does not light due to the induced current occurs in the coil only at this time because the current is conducted only when a breakdown occurs. .